Added toString() for PackedRule.
Merge branch 'devel' of https://github.com/joshua-decoder/joshua into devel
Changed HGNode from hierarchical String signatures to hashCode()-based Signature() meta-object.
Merge branch 'devel' of https://github.com/joshua-decoder/joshua into devel
Fix to HGNode equals.
Merge branch 'devel' into hashcode
updated test cases (floating point error)
disabled test cases (broken, and too long)
updated test case with rounding errors
updated test case for thrax changes